I have the latest source (build 78915, July 06, 2012) and while the ECMAScript.dll is now a linked resource, it is still an unsigned reference.
Are you talking about some other 'source'??
Any attempt to sign the compressor project results in a 'Referenced assembly 'ECMAScript.NET' does not have a strong name'. (Visual Studio 2010).
FWIW, the same problem occurs with the IesiCollections assembly, but I am already building / signing NHibernate which includes that source, so at the moment, it is only a minor reference change in the YUI projects.
Most likely i can disassemble ECMAScript.dll and reassemble with a signature, but if the supporting dll's were already strong named in the source package (and perhaps on NuGet) then it would save me (and those that follow) a lot of effort.
Thanks for the quick responses and all of your work on these projects!